Compositions: ceramic – Ceramic compositions – Refractory
Patent
1992-08-26
1995-02-07
Bell, Mark L.
Compositions: ceramic
Ceramic compositions
Refractory
501 98, C04B 3558
Patent
active
053875621
ABSTRACT:
Silicon slip-casting composition, and process for the preparation thereof
A silicon slip-casting composition comprising from 25 to 50% by weight of water and a pulverulent solid component which essentially comprises silicon and inorganic sintering aids is described, where the aqueous phase has a pH in the range from 8 to 9.5. The solid component comprises from 65 to 88% by weight of silicon, from 5 to 24% by weight of Y.sub.2 O.sub.3, from 2 to 9.6% by weight of Al.sub.2 O.sub.3 and from 1 to 5% by weight of SiO.sub.2 on the surface of the Si particles.
The mean particle size of the solid component is at most 20 .mu.m, in particular at most 5 .mu.m. The invention also relates to a process for the preparation of the slip-casting composition.
REFERENCES:
patent: 4471060 (1984-09-01), Dickie et al.
patent: 4482388 (1984-11-01), Crosbie
patent: 4562041 (1985-12-01), Mangles et al.
patent: 5055432 (1991-10-01), Edler et al.
patent: 5166106 (1992-11-01), Edler et al.
patent: 5213729 (1993-05-01), Edler et al.
Dillinger et al., "Slip-Cast Hot Isostatically Pressed Silicon Nitride Gas Turbine Components", Materials Science And Engineering, Bd. A109, 1988, pp. 373-378 no month.
Dillinger Reinhard
Heinrich Jurgen
Bell Mark L.
Hoechst Ceramtec Aktiengesellschaft
Wright A.
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